Fireproof floor construction.



E. V. JOHNSON FIRBPRooF PLooR GONSTRUGTION.

APPLICATION FILED DBO. 9, 1910.

Patented 0013.21, 1913.

ERNEST vfyJoHNsoN, oFcHIcAco, iLLINoIs.

"rrnnraoor FLOOR CONSTRUCTION.

Specification of Lettersfatent.

Application filed December 9, 1910. Serial No. 596,418. l

V`IATolaZ-Z 107mm it may concern y Be-it knowny that LI, j ERNi'sT .I orrNsois, 'a' citizen' of the United States, residlng in Cliicago,in.tlie county of'Cookand State of Illinois, .havejinventedy a new and useful Improvement in' Fi'reproof. Floor Construc- "'tion,.lof which` .the following'is'a specifica- .f My. l'invention relates to improvements in 'reproof floor construction Afor. buildings', Aand more particularlytoihollow tile fireproof floor constructions;`

constructie-n, and which may berapidly and cheaply erected and in which all the tile will be rigidly and firmly united and bonded together by and individually surrounded and incased in a continuous network of cement or concrete. l

My invention consists in the means I employ to practically accomplish this object or result as herein shown and described and more particularly specified in the claims.

In my invention, each of the hollow tiles is provided at each of its open upright faces with a wire-mesh closure of light wire netting secured thereto by metal brads or wooden pegs driven into the tile at each end thereof. The mesh of the wire netting or screen is sufficiently {ine or close, preferably about twelve to the inch, to prevent liquid Portland cement, concrete or grouting passing through the wire mesh. The hollow tiles with their hollows thus closed at each end by the wire mesh or netting are then laid or set in place on the customary portable centering or false floor work and between the horizontal steel beams or girders of the building framework, a space preferably of about three quarters of an inch being left between the upright end faces of the adjacent tiles and between the adjacent rows of tiles, which are laid in the usual way to break joints. The continuous open space network between the side and the end faces of the tile is then filled in with liquid Portland cement, concrete or grouting, the same being poured in in a liquid condition so that it will solidly or completely fill all the spaces between the upright side and end faces of adjacent tiles, and thus form, when the ccment sets, a solid and continuous network of cement or concrete upright webs by which each and every tile is surrounded and em- Tle object of my `lnventio'n is to rovi/de a hollow tile fireproof floor which wi l be ofl a simple, efficient, light; strong and durablev braced on all its upright faces, and iniwhich the tiles are embedded and 'by which all the tile are bonded and united' together in one :monolithic cement concretemass or network. The-wire mesh closures at both ends of each hollow tile are most conveniently secured to the end faces of the tile 'by small metal brads or tacks, which may be readily driven into 'the tile if` the same are soft.

Where 'hard burned tile are employed, the wireunesh Aclosures are preferablysecured inplace on the end faces of the tilelby wood pegs driveninto the -holesfwhich are customarily formed at the cornersofthe'tile to insure perfection of hollow `tileat the corners.`-. W

In the accompanying drawing, Figure 1 is a perspective view, partlyinvertical section, and partly broken away, of a hollow vtile fireproof floor construction embodying my invention. Fig. 2 is a perspective v1ew of one of the hollow tile. Fig. 3 is an enlarged, detail, partial section on line 33 of Fig. 2.

In the drawing, l, 2 represent longitudinally and transversely extending steel beams or girders of the building framework and 3 a portion of the portable centering or false fioor used in the construction or erection of the hollow tile fireproof floor. Each of the hollow tile 4' has a plurality of hollows 5 extending through it from end to end. As indicated in the drawing, each of the hollow tile is furnished with six of these hollows 5, their number being varied according to the size of the tile, the tile being usually made about twelve inches long and twelve inches wide, and their height or vertical dimension being varied according to the thickness and strength of the door to be constructed therewith. Each of the tile 4 is provided at each of its open ends with a wire mesh closure 6 secured thereto by brads or pins 7 driven into the tile. If the tile are soft, the brads or pins 7 may be metal and driven directly into the tile. If, however,the tile ne hard, the brads or pins 7 are preferably of wood and made of larger size and driven 4into the holes 8 which ordinarily extend through the tile from end to end at the corners thereof. The wire mesh closure 6 preferably laps over or covers about one half the thickness of the exterior webs 9 of the tile, so that the portion of the end face 10 of the tile will be left free and exposed for more direct contact with the Patented oet. 21,1913.;

f frame and upon the portable'centering or I crete or groutin is thenl poured intov the etween the side and lend false flooring 3, withan Aopen space 1.1, preferably about three-quarters of an 1nch in width between the side and end faces of adjacent tile. Liquid Portland cement, con` open s aces 11y faces o the tile, the wire mesh closure 6, 6 at-l theopen ends of adjacent'tile preventing the Iliquid material fromentering the' hollows 5 of the tile. 'Each of the tile 4 is thus ern' bedded in and surrounded 'at all of its uprightlside and end faces by the cement, con` crete or grouting 14 which. forms, when set,

L a solid, :continuous network of cement, con crete l uprightV webs which bond and unite all 'the Atile together. The tile 4 are -laidl with their open endsV adjacentand in rows or courses 15 extending between the steel beams or girders 1, l, the tilein one `row 'the' tile b Witnesses:

breaking joints with those in .the adjacent v Y .l A Y I claim 1. A hollow tile having an opening therein and provided with a wire mesh closure at one end' thereof iand adapted to prevent liq- Y uid cement from flowing into the interior of the tile, and means for permanently securing said wire mesh closure to the tile, said means including 'a wedge shaped brad passing through the wire mesh closure and extending into said opening in the t.ile,lwhereby the tile with its wire meshclosure may be shipped without danger of the closure becoming displaced, substantially las specified.

'2."A hollow't-ile vhaving holes 8 and pro- 1 vided with'flat wire mesh closures atV the open'ends thereof to prevent liquid cement from flowing into the interior of the tile at either'end, said closures beingfsecured to brads'extend-ing through the closures an seated in-the holes 8 of the tile, substantially as specified. f i

ERNEST V. JOHNSON.

PEARL `Aalter/fs', I 'Y H. M; MUNDAY.

(logies of vthiapatentmay be obtained yfor ve centseach, by addressing the i 'Commissioner` bf Patents, v v g n r Washingtomn. f 

